#!/bin/sh

test_description='test <branch>@{upstream} syntax'

. ./test-lib.sh


test_expect_success 'setup' '

        test_commit 1 &&
        git checkout -b side &&
        test_commit 2 &&
        git checkout master &&
        git clone . clone &&
        test_commit 3 &&
        (cd clone &&
         test_commit 4 &&
         git branch --track my-side origin/side &&
         git branch --track local-master master &&
         git remote add -t master master-only .. &&
         git fetch master-only &&
         git branch bad-upstream &&
         git config branch.bad-upstream.remote master-only &&
         git config branch.bad-upstream.merge refs/heads/side
        )
'

sq="'"

full_name () {
        (cd clone &&
         git rev-parse --symbolic-full-name "$@")
}

commit_subject () {
        (cd clone &&
         git show -s --pretty=format:%s "$@")
}

error_message () {
        (cd clone &&
         test_must_fail git rev-parse --verify "$@")
}

test_expect_success '@{upstream} resolves to correct full name' '
        test refs/remotes/origin/master = "$(full_name @{upstream})"
'

test_expect_success '@{u} resolves to correct full name' '
        test refs/remotes/origin/master = "$(full_name @{u})"
'

test_expect_success 'my-side@{upstream} resolves to correct full name' '
        test refs/remotes/origin/side = "$(full_name my-side@{u})"
'

test_expect_success 'my-side@{u} resolves to correct commit' '
        git checkout side &&
        test_commit 5 &&
        (cd clone && git fetch) &&
        test 2 = "$(commit_subject my-side)" &&
        test 5 = "$(commit_subject my-side@{u})"
'

test_expect_success 'not-tracking@{u} fails' '
        test_must_fail full_name non-tracking@{u} &&
        (cd clone && git checkout --no-track -b non-tracking) &&
        test_must_fail full_name non-tracking@{u}
'

test_expect_success '<branch>@{u}@{1} resolves correctly' '
        test_commit 6 &&
        (cd clone && git fetch) &&
        test 5 = $(commit_subject my-side@{u}@{1})
'

test_expect_success '@{u} without specifying branch fails on a detached HEAD' '
        git checkout HEAD^0 &&
        test_must_fail git rev-parse @{u}
'

test_expect_success 'checkout -b new my-side@{u} forks from the same' '
(
        cd clone &&
        git checkout -b new my-side@{u} &&
        git rev-parse --symbolic-full-name my-side@{u} >expect &&
        git rev-parse --symbolic-full-name new@{u} >actual &&
        test_cmp expect actual
)
'

test_expect_success 'merge my-side@{u} records the correct name' '
(
        cd clone || exit
        git checkout master || exit
        git branch -D new ;# can fail but is ok
        git branch -t new my-side@{u} &&
        git merge -s ours new@{u} &&
        git show -s --pretty=format:%s >actual &&
        echo "Merge remote-tracking branch ${sq}origin/side${sq}" >expect &&
        test_cmp expect actual
)
'

test_expect_success 'branch -d other@{u}' '
        git checkout -t -b other master &&
        git branch -d @{u} &&
        git for-each-ref refs/heads/master >actual &&
        >expect &&
        test_cmp expect actual
'

test_expect_success 'checkout other@{u}' '
        git branch -f master HEAD &&
        git checkout -t -b another master &&
        git checkout @{u} &&
        git symbolic-ref HEAD >actual &&
        echo refs/heads/master >expect &&
        test_cmp expect actual
'

test_expect_success 'branch@{u} works when tracking a local branch' '
        test refs/heads/master = "$(full_name local-master@{u})"
'

test_expect_success 'branch@{u} error message when no upstream' '
        cat >expect <<-EOF &&
        error: No upstream configured for branch ${sq}non-tracking${sq}
        fatal: Needed a single revision
        EOF
        error_message non-tracking@{u} 2>actual &&
        test_cmp expect actual
'

test_expect_success '@{u} error message when no upstream' '
        cat >expect <<-EOF &&
        error: No upstream configured for branch ${sq}master${sq}
        fatal: Needed a single revision
        EOF
        test_must_fail git rev-parse --verify @{u} 2>actual &&
        test_cmp expect actual
'

test_expect_success 'branch@{u} error message with misspelt branch' '
        cat >expect <<-EOF &&
        error: No such branch: ${sq}no-such-branch${sq}
        fatal: Needed a single revision
        EOF
        error_message no-such-branch@{u} 2>actual &&
        test_cmp expect actual
'

test_expect_success '@{u} error message when not on a branch' '
        cat >expect <<-EOF &&
        error: HEAD does not point to a branch
        fatal: Needed a single revision
        EOF
        git checkout HEAD^0 &&
        test_must_fail git rev-parse --verify @{u} 2>actual &&
        test_cmp expect actual
'

test_expect_success 'branch@{u} error message if upstream branch not fetched' '
        cat >expect <<-EOF &&
        error: Upstream branch ${sq}refs/heads/side${sq} not stored as a remote-tracking branch
        fatal: Needed a single revision
        EOF
        error_message bad-upstream@{u} 2>actual &&
        test_cmp expect actual
'

test_expect_success 'pull works when tracking a local branch' '
(
        cd clone &&
        git checkout local-master &&
        git pull
)
'

# makes sense if the previous one succeeded
test_expect_success '@{u} works when tracking a local branch' '
        test refs/heads/master = "$(full_name @{u})"
'

cat >expect <<EOF
commit 8f489d01d0cc65c3b0f09504ec50b5ed02a70bd5
Reflog: master@{0} (C O Mitter <committer@example.com>)
Reflog message: branch: Created from HEAD
Author: A U Thor <author@example.com>
Date:   Thu Apr 7 15:15:13 2005 -0700

    3
EOF
test_expect_success 'log -g other@{u}' '
        git log -1 -g other@{u} >actual &&
        test_cmp expect actual
'

cat >expect <<EOF
commit 8f489d01d0cc65c3b0f09504ec50b5ed02a70bd5
Reflog: master@{Thu Apr 7 15:17:13 2005 -0700} (C O Mitter <committer@example.com>)
Reflog message: branch: Created from HEAD
Author: A U Thor <author@example.com>
Date:   Thu Apr 7 15:15:13 2005 -0700

    3
EOF

test_expect_success 'log -g other@{u}@{now}' '
        git log -1 -g other@{u}@{now} >actual &&
        test_cmp expect actual
'

test_done